Price Risk Management Price Risk Management (Tables)

12 Months Ended

Dec. 31, 2011

Price Risk Management [Abstract]

Schedule of Price Risk Derivatives [Table Text Block]

PGE’s net volumes related to its Assets and Liabilities from price risk management activities resulting from its derivative transactions, which are expected to deliver or settle at various dates through 2015, were as follows (in millions): 

	As of December 31,
	2011			2010
Commodity contracts:
Electricity	13		MWh	9		MWh
Natural gas	79		Decatherms	93		Decatherms
Foreign currency exchange	$	6	Canadian	$	7	Canadian

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

The fair values of PGE’s Assets and Liabilities from price risk management activities consist of the following (in millions): 

	As of December 31,
	2011			2010
Current assets:
Commodity contracts:
Electricity	$	2		$	4
Natural gas	17			9
Total current derivative assets	19		(1)	13		(1)
Noncurrent assets:
Commodity contracts:
Electricity	—			1
Natural gas	—			2
Total noncurrent derivative assets	—			3		(2)
Total derivative assets not designated as hedging instruments	$	19		$	16
Total derivative assets	$	19		$	16
Current liabilities:
Commodity contracts:
Electricity	$	66		$	77
Natural gas	150			111
Total current derivative liabilities	216			188
Noncurrent liabilities:
Commodity contracts:
Electricity	71			42
Natural gas	101			146
Total noncurrent derivative liabilities	172			188
Total derivative liabilities not designated as hedging instruments	$	388		$	376
Total derivative liabilities	$	388		$	376

(1) Included in Other current assets on the consolidated balance sheet.

(2) Included in Other noncurrent assets on the consolidated balance sheet.

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

Net realized and unrealized losses on derivative transactions not designated as hedging instruments are classified in Purchased power and fuel in the consolidated statements of income and were as follows (in millions):

	Years Ended December 31,
	2011		2010		2009
Commodity contracts:
Electricity	$	117	$	127	$	79
Natural Gas	98		192		101

Net unrealized losses and certain net realized losses presented in the table above are offset within the statement of income by the effects of regulatory accounting. Of the net loss recognized in net income for the years ended December 31, 2011, 2010, and 2009, $192 million, $258 million, and $98 million, respectively, have been offset.

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

Assuming no changes in market prices and interest rates, the following table indicates the year in which the net unrealized loss recorded as of December 31, 2011 related to PGE’s derivative activities would be realized as a result of the settlement of the underlying derivative instrument (in millions):

	2012		2013		2014		2015		Total
Commodity contracts:
Electricity	$	64	$	42	$	21	$	8	$	135
Natural gas	132		72		24		6		234
Net unrealized loss	$	196	$	114	$	45	$	14	$	369

Schedule of Concentration of Risk, by Counterparty [Table Text Block]

Counterparties representing 10% or more of Assets and Liabilities from price risk management activities were as follows:

	As of December 31,
	2011		2010
Assets from price risk management activities:
Counterparty A	19	%	1	%
Counterparty B	16		1
Counterparty C	13		5
Counterparty D	7		22
Counterparty E	7		23
Counterparty F	—		11
Counterparty G	—		10
	62	%	73	%
Liabilities from price risk management activities:
Counterparty E	23	%	24	%
Counterparty H	10		4
Counterparty I	7		12
	40	%	40	%

For additional information concerning the determination of fair value for the Company’s Assets and Liabilities from price risk management activities, see Note 4, Fair Value of Financial Instruments.